baber/WOPTO huggingface dataset:
Patent GB-1170811-A (GB)
Title: Automatic Focusing System
IPC: H04N1/028
Filed: 1967-01-09
Abstract: 1,170,811. Automatic focusing; cathode-ray tube circuits. ITEK CORP. 9 Jan., 1967 [14 Jan., 1966], No. 1187/67. Headings H4D and H4T. The Specification describes a system for causing a scanning raster 25 on the screen of a flying-spot scanner C.R.T. 10, to be accurately focused on a transparency 16. The raster passing through the transparency may cause corresponding video signals in the output of photo-multiplier 17 to allow the reconstitution of the transparency on C.R.T. 36. The focusing is carried out in two stages: (a) Projection lens 13 is moved by servomotor 65 to focus the raster 25 on the transparency, and (b) The electron beam in C.R.T. 10 is focused to sharpen the raster 25. Stage (a). The platform on which the transparency 16 is supported is vibrated in an axial direction through an amplitude of 20% of the depth of field of lens 13, i.e. about 2 microns, at a frequency of 10 c/s. by means of the output of oscillator 58. The focus of the raster 32 is correspondingly altered at 10 c/s., as is the amplitude of the high frequency content in the video output of detector 17. This contact is detected by high-pass filter 50 and rectifier 51, and the 10 c/s. variation of this content is detected by low-pass filter 53. With the mean position of transparency above the focal plane of lens 13 the output of filter 53 is in antiphase with that of oscillator 58, and with the mean position below said focal plane, said output is in phase with that of oscillator 58. When the mean position of the transparency coincides with the focal plane, the output of filter 53 is at 20 c/s. The outputs of oscillator 58 and filter 53 are multiplied at 55 and the output fed via a low-pass filter 61 to servolamp 64 and motor 65. The 20 c/s. output of filter 53 gives no output from amplifier 64 and the anti- and in-phase outputs give positive and negative amplifier outputs respectively. The result is that lens 13 is moved until the 20 c/s. output condition is achieved, whence raster 25 is focused on the transparency. Stage (b). The C.R.T. 10 electron beam is focused by the output of supply 30 together with a minute 10 c/s. component from oscillator 58, phaseshifted by 90 degrees at 72. The spot on the C.R.T. screen thus varies in focus at 10 c/s. and this variation is detected as desoribed and appears as a 10 c/s. signal at the output of filter 53. Since, however, it it is in phase quadrature with the output of oscillator 58, it produces no output from multiplier 55. Multiplier 70, however, connected to the output of filter 53, is also connected to the output of phase shifter 72. The multiplier 70 and lowpass filter 73 thus give zero, positive or negative bias voltages for addition at 78 to the focusing signal, according to whether the spot is in focus or out of focus either way. The platform may be vibrated mechanically, Fig. 2, or pneumatically, Fig. 3.
Patent GB-790160-A (GB)
Title: Improvements in bottle washing compositions
IPC: C11D7/06
Filed: 1956-01-13
Abstract: A glass-washing composition comprises an alkali and from 1-25 per cent, preferably 5-20 per cent, based on the weight of alkali of a polyol ether conforming to the formula: (HO)x-C6H8-[O(CnH2nO)z H]y wherein C6H8 is the hydroxyl-free residue of a hexitol, x is at least 4, y is at least 1, x plus y is 6, n is 2 or 3, z is 1 or 2, and y times z is not more than 2.  The preferred compound of this nature is a monohydroxypropyl ether of sorbitol.  The alkali of the composition is generally caustic soda, with or without up to 10 per cent by weight of anhydrous sodium carbonate.  The compositions may be produced in solid or concentrated liquid form, but in either case before use are usually diluted to a 2-10 per cent aqueous solution. They may be employed in conjunction with such wetting agents as alkylaryl sulphonic acids and their salts, sulphated higher fatty alcohols, polyoxyethylene ethers of alcohols, alkyl phenols or fatty amines, suitably in a proportion of 1-5 per cent, based on the alkali.
Patent GB-907238-A (GB)
Title: Improvements in or relating to the preparation of novolak resins
IPC: C08G8/28
Filed: 1959-01-13
Abstract: A process for increasing to a predetermined value the softening point of a novolak resin from whcih the volatile matter has been removed, while maintaining the resin in a soluble, fusible form, comprises heating the resin to at least 110 DEG C. and thereafter p  adding a solid aldehyde at a rate such that the rate of addition does not exceed the rate of reaction until the novolak has the desired higher softening point.  Specified reactants utilized in preparing the novolak are phenolsphenol itself, o- and p-cresols, o- and p-ethyl phenols, o- and p-isopropyl phenols, o- and p-tert. butyl phenols, o- and p-sec.-butyl phenols, o- and p-amyl phenols, o- and p-octyl phenols and o- and p-nonyl phenols; aldehydesformaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, heptaldehyde, benzaldehyde, toluic aldehyde, naphthaldehyde, furfuraldehyde, glyoxal and acrolein and compounds capable of engendering aldehydes such as paraformaldehyde, paraldehyde, trioxane, hexamethylene tetramine and metaldehyde and solutions of aldehydes such as formalin.  The examples describe the preparation of novolaks from o-cresol and formalin using oxalic acid dihydrate as catalyst and the further reaction of these novolaks with paraformaldehyde.
Patent GB-790954-A (GB)
Title: Method of cleaning semiconductor material
IPC: C30B13/16
Filed: 1956-01-13
Abstract: <PICT:0790954/III/1> A method of zone-melting a rod-like body of semi-conductor material, e.g. silicon, to effect cleaning and refining, comprises inductively heating an element arranged at one end of the body, thereby preheating a localized zone of the body to such a temperature that its conductivity is sufficient for direct inductive heating but such that the zone does not melt, causing the preheated localized zone to traverse the body to the other end, further raising the temperature of the localized zone by direct inductive heating sufficient to melt the semi-conductor over the localized zone, and causing the molten zone effectively to traverse the body back to the one end.  Silicon rod 1, mounted vertically in small ceramic pipes 2a, 2b, as holders, is first raised, by a device (not shown) capable of moving the rod vertically at any adjustable speed until carbon or graphite ring 5, fixed by quartz pipe 6 to holder 2b, is inside high-frequency coil 4.  The ring 5 is heated to glowing and heats the rod.  When the portion of rod within the ring has been heated sufficiently, i.e. to red heat, the rod is moved down so that the glowing zone moves upwards therethrough.  At the upper end of the rod, the silicon is brought to its melting point, and the molten zone is moved down the rod, which is raised at 10 cms./hr. The ring 5 is not allowed to re-enter the coil 4 and remains cold. The process may be repeated.  Quartz pipe 3 may enclose the rod through which protective gas, e.g. N2 or He, may flow.
Patent GB-275485-A (GB)
Title: Improvements in or relating to garters or sleeve holders
IPC: A41F19/00
Filed: 1927-01-17
Abstract: 275,485. Kagan, A., and Menz, (nÚs Trebbin), M. Jan. 17, 1927. No Patent granted (Sealing fee not paid). Garters; sleeve adjusters. - Garters, sleeve holders, or the like are made of elastic material in the form of a hollow ring a, the space being either filled with air or gas b under compression or with rubber sponge c. As shown, one face b<1> may be flat while the other c<1> is convex; or both may be convex.
Patent GB-547669-A (GB)
Title: Improvements in the manufacture of polyhydro-dibenzopyran derivatives
IPC: C07D311/80
Filed: 1941-02-03
Abstract: 547,669. Polyhydrodibenzopyran derivatives. ROCHE PRODUCTS, Ltd., TODD, A. R., and GHOSH, R. Feb. 3, 1941, No. 1430. [Class 2 (iii)] Polybydrodibenzopyran derivatives are prepared by the condensation of 5-alkyl resorcinols of the general formula with pulegol or pulegone. The preferred alkyl iesorcinols are orcinol and olivetol. It is stated that the compounds so prepared show the physiological characteristics of cannabis resin. In examples (1) Pulegol is refluxed with orcinol monohydrate in decalin solution to give 6"- hydroxy-2:2:5<SP>1</SP>:4<SP>11</SP>-tetramethyl - - 1<SP>1</SP>:2<SP>1</SP>:3<SP>1</SP>:4<SP>1</SP>:5<SP>1</SP>:6<SP>1</SP> - hexahydrodibenzopyran. (2) Pulegone is refluxed with orcinol monohydrate in formic acid solution to give after acetylation 6<SP>11</SP>- acetoxy - 2:2:5<SP>1</SP>:4<SP>11</SP> - tetramethyl - 3<SP>1</SP>:4<SP>1</SP>:5<SP>1</SP>:6<SP>1</SP> - tetrahydrodibenzopyran. On dehydrogenation with palladised charcoal 6<SP>11</SP>-hydroxy-2:2:5<SP>1</SP>:4<SP>11</SP>- tetramethyldibenzopyran is formed. (3) Pulegone is refluxed with olivetol monohydrate in formic acid solution, and the product dehydrogenated as before to give after treatment with p-nitrobenzoyl chloride, the p-nitrobenzoate of cannabinol. Specification 543,363 is referred to.
Patent GB-1389651-A (GB)
Title: Continuous unwinding device in particular for printing machines
IPC: B65H19/12
Filed: 1973-01-11
Abstract: 1389651 Handling web rolls CONSTRUCTIONS MECANIQUES PIERRE HANSSEN & CIE SA 11 Jan 1973 [13 Jan 1972] 1451/73 Heading B8R A web roll changing device comprises pairs of upright columns 3 1 , 3 2 ; 4 1 , 4 2 , interconnected at their upper ends by transoms 6 and each pair supporting a web roll mounting carriage 11, 12 movable in the vertical plane by driven spindles 47, 48; 49, 50. For changing the web rolls 33, 34, involving relative vertical carriage movement, the web rolls whose shafts 31, 32 are normally disposed in a common vertical plane are pivoted upwardly towards their respective upright columns by hydraulic jacks 41, 42 so that the carriages 11, 12 can pass each other during the relative vertical movement.
Patent GB-816351-A (GB)
Title: Improvements in pneumatic tools
IPC: E21C37/24
Filed: 1957-01-15
Abstract: 816,351. Percussive tools. SALENGRO, P.A. Jan. 15, 1957 [Jan. 19, 1956], No. 1486/57. Class 124. A pneumatic percussive tool comprises a drive member including a cylinder slidable in a casing, a spring interposed between the drive member, or an element rigid therewith, and the casing, a chamber for receiving compressed air connected to a source of compressed air without appreciable drop in pressure in the connection and, through a valve mechanism, to the cylinder of the drive member, the cylinder being urged into a position of rest by a spring and being in connection with the compressed air chamber in all positions of the drive member. As shown, a tool has a casing 1 in which is supported a drive member 8 comprising a cylinder and a piston 41, the drive member being urged into a position of rest by a spring 23 supported between rings 24 and 25, the former abutting flange 26 on the drive member and flange 27 on the casing. The ring 25 in the rest position abuts flange 28 on the drive member and is able after movement of the drive member to abut flange 29 on the casing. Mounted at the back head end of drive member 8 is a valve carrying a tube 32 which extends into a chamber 7 in the back head and carries a series of lateral holes 32c and a central hole 32b, the chamber 7 being connected to a source of compressed air. In operation, when pressure is applied to the tool through the handles 2, the drive member is moved towards the back head and one or more of the openings 32c enter the chamber 7 increasing the amount of compressed air supplied to the valve. This increase may continue until the flange 26 abuts a flange 30 on the casing. When pressure on the handles is released the spring returns the drive member to its position of rest. When a pull is exerted on the handles, e.g. when the steel sticks in the drill hole, the casing moves relatively to the drive member and the amount of compressed air supplied is reduced, until the flange 24 abuts a flange 31 on the casing at which time an opening 32d in the tube 32 admits air to a chamber above the drive member which chamber is open to the atmosphere through a port 22. In a modification, Fig. 1(a) not shown, two springs are used one of which is stronger than the other, and in a further modification, Fig. 2 (not shown), two springs are again used, one being disposed on either side of a central bearing collar on the drive member. Devices to prevent the rotation of the drive member, particularly when the steel is given some rotary motion, are described.
Patent GB-546999-A (GB)
Title: Improvements in or relating to the manufacture of organic amides
Filed: 1941-02-05
Abstract: 546,999. Amides; amines. IMPERIAL CHEMICAL INDUSTRIES, Ltd. (Du Pont de Nemours & Co., E.I.). Feb. 5, 1941, No. 1529. [Class 2 (iii)] Amides are obtained by catalytically hydrogenating a nitrile in the presence of an ester, e.g. methyl formate. Temperatures up to 200‹C and pressures of 25-3000 pounds per sq. inch may be employed. The products may be hydrolysed to yield amines. According to examples ; (1) a mixture of glycolonitrile and methyl formate is hydrogenated at 50 pounds per sq. inch using a nickel catalyst. The product is #-hydroxyethyl-formamide; (2) N- laurylacetamide is obtained by hydrogenating a mixture of lauronitrile and ethyl acetate ; (3) succinonitrile and methyl formate are hydrogenated, the product is evaporated with hydrochloric acid and distilled under reduced pressure from sodium hydroxide. A 70 per cent. yield of tetramethylenediamine is obtained ; (4) Adiponitrile and methyl formate are hydrogenated yielding N:N<SP>1</SP>-diformyl hexamethylenediamine ; (5) dimethylaminoacetonitrile and methyl formate are hydrogenated ; the product on hydrolysis gives a mixture of N:N-dimethylene diamine and bis(dimethylaminoethyl) amine.
Patent GB-996924-A (GB)
Title: Improvements in or relating to tedders
IPC: A01D78/02
Filed: 1962-01-15
Abstract: The subject-matter of this Specification is the same as that of Specification 996,921 but the claims differ.  Specifications 996,922; 996,923; 996,925 and 996,926 also are referred to.  Reference has been directed by the Comptroller to Specification 937,905.
Patent GB-915857-A (GB)
Title: Guide devices for roller presses for shaping filled bags
Inventor: COPELAND JOHN SAMUEL
IPC: B65B61/24
Filed: 1961-01-13
Abstract: 915,857. Endless belt conveyers. CONTINENTAL CARBON CO. Jan. 13, 1961, No. 1590/61. Class 78 (1). [Also in Group XVII] A conveyer comprises a pair of superposed and convergent flat conveyer belts 20 and 22 and a row of idle-rollers 33 on each side of the space between the belts and at right-angles to their surfaces, such that the rollers contact the sides of the objects conveyed; the rollers each have the same diameter but decrease in length toward the convergent ends of the conveyer belts. The conveyer belts are supported by a succession of rolls such as 10 and 12 mounted on the superposed vertically-adjustable shafts 6 and 8, respectively, which are carried by the frame 2 and which are power-driven. The idle rollers 33 are mounted in the channel members 30 at the inner ends of rods 28 in holders 26; such channel members may number four on each side of the conveyer and each may carry twenty-one rollers. The channels, shafts 32, and rollers 33 taper downwardly in height from the inlet to the outlet end of the conveyer to give compression to the objects conveyed. Another embodiment comprises an endless conveyer belt trained round the rollers 33, the belt being slit at regular intervals along its upper edge to enable it to fold back over the rollers at the narrow discharge end and return between the bottom of the channel and the rollers.
Patent GB-1066141-A (GB)
Title: Gas turbine power plant
IPC: F02C1/04
Filed: 1966-01-13
Abstract: 1,066,141. Gas turbine plant. GENERAL MOTORS CORPORATION. Jan. 13, 1966 [Feb. 15, 1965], No. 1603/66. Heading F1G. The invention relates to a gas turbine power plant in which means are provided for varying the temperature of the gas entering the compressor, there being a control device responsive to turbine operation connected to the said means so as to vary the said temperature and thereby the power output of the power plant. The power plant shown in Fig. 1 is an open cycle plant and comprises a compressor 10, a working fluid heater 13 and a turbine 16 which is connected to the compressor 10 by the shaft 18 and to an alternator 28 by shaft 29. Air enters the compressor 10 at inlet 11 and passes from the compressor through the heater 13 to the turbine 16, the turbine exhaust air discharging through outlet 17 under the control of valve 36 either through line 38 to atmosphere or through line 39 into the compressor intake 11. The valve 36 is controlled in dependence on turbine speed as sensed by governor 31 so that as the turbine speed increases, turbine exhaust air passes through line 39 into the compressor intake so that the compressor inlet temperature is increased so that the specific output of the power plant decreases with diminishing load. The working fluid heater 13 comprises a coil 24 through which liquid metal flows thus transferring heat from a heat source 21 such as a nuclear reactor, waste heat source or a geothermal source, to the turbine working fluid. In a second embodiment Fig.4 not shown, the power plant is of the closed cycle type, working fluid such as air passing from the compressor 50 through the preheated 51, then through the heater 52 to the turbine 53, the turbine exhaust air then passing back through the preheater 51 and precooler 55 to the compressor. The precooler 55 is cooled by means of a fan 61 driven by a motor 62, the speed of the motor and fan being controlled in dependence on turbine speed as sensed by a governor 63 so that as the turbine speed increases so the speed of the fan is reduced and the temperature of the working fluid at the inlet of the compressor is increased.
Patent GB-1206016-A (GB)
Title: Mass flow meter for gases
Inventor: PFREHM RAYMOND HARRY
IPC: G01F1/86
Filed: 1968-01-11
Abstract: 1,206,016. Measuring mass flow-rate electrically. ESSO RESEARCH & ENG. CO. Jan.11, 1968 [Feb.16, 1967], No.1603/68. Headings G1N and G1R. The mass flow-rate of a gas through a conduit 11, Fig.1, is obtained by spacing a turbine meter 12 upstream of an orifice meter 13, and dividing the output #P from the orifice meter by the output signal f from the turbine meter, the quotient being proportional to the mass flow-rate. The minimum spacing between the two meters for conduits with andwithout straightening valves, and limiting valves of meter characteristics are specified.
Patent GB-196354-A (GB)
Title: Improvements in or relating to reflectors for use with motor vehicle head-lamps and the like
IPC: F21V7/00
Filed: 1922-01-18
Abstract: 196,354. Walkey, W. R., and Bargate, A. F. Jan. 18, 1922. Reflectors. - A concave reflector for use on motor-car lamps and the like is formed of sheet metal, and has a number of nodes or bosses 8 formed on it, convex to the reflecting-surface 5, by stamping or embossing the convex rear face 6 of the reflector. The stamping tool may be pointed or W-shaped to produce correspondingly shaped bosses, and the bosses may be arranged in any desired manner. The reflector may be made of silver-plated copper and of parabolic dished or spherical section. Specifications 14277/90 and 17433/05 are referred to.
Patent GB-542265-A (GB)
Title: Improvements in and relating to stray transformers
IPC: H01F29/10
Filed: 1941-02-06
Abstract: 542,265. Transformers. ROSENFELD, M. Feb. 6, 1941, No. 1611. [Class 38 (ii)] In a polyphase high reactance transformer having at least three core limbs, the limbs 1, 2, 3 are arranged on both sides of a single leakage member 4 located between the primary and secondary windings on the core limbs. Thus longitudinal displacement of the leakage member effects simultaneous adjustment of the reluctance of all the leakage paths. The invention is also applicable to four-limbed transformers, e.g. Scottconnected transformers.
Patent GB-285403-A (GB)
Title: Process for the production of inactive menthol (the racemate of natural menthol)
IPC: C07C35/12
Filed: 1927-04-04
Abstract: 285,403. Rheinische Kampfer-Fabrik Ges. Feb. 15, 1927, [Convention date]. Menthol and its isomers. - i-Neomenthol and i-neoisomenthol are transformed, separately or together, into i-menthol either by (1) treatment with hydrogen at ordinary or increased pressure in the presenoe of a hydrogenation catalyst, (2) heating with the mentholates of the alkali or alkaline earth metals, magnesium or aluminium at temperatures above 100‹ C., or (3) oxidation with chromic acid or treatment with dehydrogenation catalysts, followed by hydrogenation of the resulting i-menthone or i-isomenthone. The neomenthol and neoisomenthol may be obtained by the process of Specification 285,394. The hydrogen treatment may be effected with the addition of i-isomenthol, thymol, i-menthone or i-isomenthone, and the oxidation or dehydrogenation in the presence of i-isomenthol. The reaction product is subjected to freezing-out or fractional distillation or both, and the crude imenthol obtained is purified by conversion into its esters or ester-acids, e.g. of p-nitrobenzoic, carbonic, boric, phthalic or succinic acid, followed by crystallization and saponification (see Specification 289,125). Examples of each of the processes are given. Specifications 213,991, 231,827, and 238.314 are referred to. Mentholates of alkali metals and alkaline earth metals are prepared bv interaction of menthol or its isomers with. the metals or compounds thereof such as the alcoholates or amides; the mentholates of magnesium and aluminium are obtained by the treatment of menthol with the metal alcoholate or amide.
Patent GB-475233-A (GB)
Title: A device for the use of concrete mixing machines for the sifting of materials
IPC: B28C5/08
Filed: 1937-01-20
Abstract: 475,233. Mixing and sifting machines. FAURE, A., and FAURE, A. Jan. 20, 1937, No. 1715. Convention date, Dec. 8, 1936. [Classes 86 and 117] Concrete-mixers are adapted for sifting by fitting the discharge orifices with a sieve. As shown in Fig. 1, the sieve 5, in the form of a drum, is removably fitted to the mouth of a mixer drum 1 which is rotated in opposite directions for mixing and discharging. In the case of a mixer which is discharged by means of a pivoted shoot, the sieve is fitted with a blade which replaces the shoot. The sieve may be fitted with an apertured plate for regulating the feed of materials thereto, and may be flat. The sieve may also be permanently fixed to the drum and a broad rim thereon provided with circumferential openings which are closed when the material is to be sifted but opened when mixing is to be effected.
Patent GB-1278922-A (GB)
Title: A switch contact assembly for relays, switches or the like
IPC: H01H1/28
Filed: 1970-01-14
Abstract: 1278922 Switch contacts HEDDERNHEIMER METALLWARENFABRIK AG WERK FLUORN 14 Jan 1970 [16 Jan 1969] 1748/70 Heading H1N A contact assembly has at least one movable contact spring 1 co-operating with stationary contact springs 2, 3, and carrying a tiltably mounted contact-making yoke 9 by means of an extension (1a, Fig. 2, not shown) passing through a slot (9a) in the yoke 9, the yoke being secured on the extension by a snap-action spring 6 which also has a slot receiving the extension (1a). As shown, the yoke 9 is substantially U- shaped and when an actuating spring 5 moves spring 6 overcentre the yoke 9 engages a fixed contact 11 and tilts until its curved shank abuts the blade 1, thereby providing a wiping and cleaning action on the contact-making surfaces. The free end of blade 1 may have a knife-edge (1b) on which the yoke 9 pivots.